John W. Harrell
44Patents
28h-index
55Co-inventors
88Inventor score
Filing activity: Sep 18, 1974 → Aug 3, 2012
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US6176323A | Drilling systems with sensors for determining properties of drilling fluid downhole | Fixed Constructions | 394 | Expired |
| US6088294A | Drilling system with an acoustic measurement-while-driving system for determining parameters of interest and controlling the drilling direction | Physics | 347 | Expired |
| US5842149A | Closed loop drilling system | Fixed Constructions | 291 | Expired |
| US6167965A | Electrical submersible pump and methods for enhanced utilization of electrical submersible pumps in the completion and production of wellbores | Mechanical Engineering; Lighting; Heating | 245 | Expired |
| US6281489A | Monitoring of downhole parameters and tools utilizing fiber optics | Physics | 242 | Expired |
| US6588266B2 | Monitoring of downhole parameters and tools utilizing fiber optics | Physics | 240 | Expired |
| US6206108A | Drilling system with integrated bottom hole assembly | Fixed Constructions | 234 | Expired |
| US6233524A | Closed loop drilling system | Fixed Constructions | 225 | Expired |
| US6112817A | Flow control apparatus and methods | Fixed Constructions | 162 | Expired |
| US6041860A | Apparatus and method for performing imaging and downhole operations at a work site in wellbores | Fixed Constructions | 161 | Expired |
| US6268911A | Monitoring of downhole parameters and tools utilizing fiber optics | Physics | 158 | Expired |
| US6065538A | Method of obtaining improved geophysical information about earth formations | Fixed Constructions | 135 | Expired |
| US5667023A | Method and apparatus for drilling and completing wells | Fixed Constructions | 115 | Expired |
| US5995449A | Method and apparatus for improved communication in a wellbore utilizing acoustic signals | Fixed Constructions | 107 | Expired |
| US5869968A | Method and apparatus for avoiding mutual coupling between receivers in measurement while drilling | Physics | 100 | Expired |
| US6097310A | Method and apparatus for mud pulse telemetry in underbalanced drilling systems | Fixed Constructions | 95 | Expired |
| US5679894A | Apparatus and method for drilling boreholes | Fixed Constructions | 85 | Expired |
| US6531694B2 | Wellbores utilizing fiber optic-based sensors and operating devices | Physics | 81 | Expired |
| US6006844A | Method and apparatus for simultaneous coring and formation evaluation | Fixed Constructions | 78 | Expired |
| US6209640A | Method of obtaining improved geophysical information about earth formations | Fixed Constructions | 78 | Expired |
| US6450258B2 | Method and apparatus for improved communication in a wellbore utilizing acoustic signals | Fixed Constructions | 72 | Expired |
| US7040390B2 | Wellbores utilizing fiber optic-based sensors and operating devices | Physics | 72 | Expired |
| US6787758B2 | Wellbores utilizing fiber optic-based sensors and operating devices | Physics | 65 | Expired |
| US7201221B2 | Wellbores utilizing fiber optic-based sensors and operating devices | Physics | 57 | Expired |
| US6310829A | Method and apparatus for improved communication in a wellbore utilizing acoustic signals | Fixed Constructions | 46 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.